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Dear Bruce,


Thank you so much for your reply. 


The original image is a T1 image in nifti format. 


Yes, 001.mgz image looks fine. It shows the correct view whichever I selected:



The images are processed in a server by batches - there are 1-2 images have error, while the rest are fine in the same batch. Please kindly advise.


Thank you very much again for your help.


Best regards,

Krystal



From: freesurfer-bounces@nmr.mgh.harvard.edu <freesurfer-bounces@nmr.mgh.harvard.edu> on behalf of Fischl, Bruce R.,PHD <BFISCHL@MGH.HARVARD.EDU>
Sent: 19 June 2023 21:48:08
To: Freesurfer support list
Subject: Re: [Freesurfer] [FreeSurfer] Talairach Failure Detection
 

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What was the format of your original image? This generally means that the direction cosines were incorrect in it. Don’t worry about the resampling artifacts – that is because it is interpolating the 001.mgz into the voxel space of the orig.mgz. If you load the 001.mgz without the orig it will look fine.  Are you sure that the 001.mgz looks fine in all views (like are inferior/superior correct)?

 

Cheers

Bruce

 

From: freesurfer-bounces@nmr.mgh.harvard.edu <freesurfer-bounces@nmr.mgh.harvard.edu> On Behalf Of Krystal Xiwing Yau
Sent: Monday, June 19, 2023 3:51 AM
To: freesurfer@nmr.mgh.harvard.edu
Subject: [Freesurfer] [FreeSurfer] Talairach Failure Detection

 

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Dear Freesurfer experts,

 

I would like to seek for help regarding talairach error. I have browsed through the forum about it but still not solving my problem...

 

The following steps are the solutions I have tried:

 

  • Re-run recon-all with -notal-check
  • Re-run recon-all with -notalairach
    • The above flags gave the same error message as follow:
    • WARNING2: gca.c::GCAhistoScaleImageIntensities: h_mri->nbins=100, mri_peak=108
      after smoothing, mri peak at 0, scaling input intensities by inf
      error: Numerical result out of range
      error: GCAhistoScaleImageIntensities: could not find wm peak
      Command exited with non-zero status 252
  • Ran the command to fix the registration: tkregisterfv --s Sub-108 --fstal --no-surfs
    • The view for this subject is weird because it shows the axial view when the coronal view is selected
    • The correct view showed up when the coronal view is selected

 

 

When I viewed 001.mgz in Freeview, there was no such problem. However, some artifact (i.e. the weird lines) occurred in certain slices, as circled in pink:

 

 

I am not sure how to fix it with tkregisterfv and what are the standards for it.

 

It would be so much appreciated if someone could help out with this issue. 

 

Regards,

Krystal

 

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